Optical Oscillator Strengths from 'Electron-impact Photoionisation' in the RCX Potential

Abstract

Electron-impact collisions excite optically allowed as well as optically forbidden transitions. In this paper we report details of optical oscillator strengths calculated using the RCS potential. The oscillator strengths have been calculated using the small-momentum-transfer limit (K -+ 0) of the electron-impact generalised oscillator strength. Results for the Cooperminimum trajectories for some high-Z (82-90) atoms and for Kr 3p ionisation are reported. These have been found to be in fair agreement with results of previous calculations in which more involved techniques were used. The present results offer further support to the utility of the RCS potential in atomic physics by providing first estimates of some important atomic properties, using a relativistic atomic potential which is computationally not very demanding